Date: Tue, 07 Dec 1999 00:35:49 -0800 From: Mike Smith <msmith@freebsd.org> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG Subject: Re: cvs commit: src/sys/kern kern_shutdown.c Message-ID: <199912070835.AAA01052@mass.cdrom.com> In-Reply-To: Your message of "Tue, 07 Dec 1999 00:29:12 PST." <199912070829.AAA75674@apollo.backplane.com>
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> The disk can lie about whether it has written data to the disk without > messing softupdates up, but it cannot reorder writes that the system has > told it must be ordered. SCSI has a tag to guarentee ordering (or not), > but I don't know if IDE has the same sort of feature. No, it doesn't. I'm not entirely sure that SCSI disks will honour the ordered tag all the way down to the media, either. It wouldn't surprise me very much to see it honoured only to the cache, with no guarantee that a completed ordered tag guarantees on-media state. -- \\ Give a man a fish, and you feed him for a day. \\ Mike Smith \\ Tell him he should learn how to fish himself, \\ msmith@freebsd.org \\ and he'll hate you for a lifetime. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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